Updated October 2026
Olympic National Park Weather by Month
Olympic National Park is warmest in August, when the nearest NOAA climate station averages a high of 75°F and a low of 52°F, and coldest in December, with an average high of 41°F and an average low of 33°F. November is the wettest month, with about 10.1 inches of precipitation. Snowfall is heaviest in January, at about 1 inch.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 15.1 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Olympic National Park can differ from these, particularly with elevation.
Warmest month
Aug
75°F avg high
Coldest month
Dec
33°F avg low
Wettest month
Nov
10.1 in avg
Snowiest month
Jan
1.0 in avg
Longest days
Jun
15.8 h of daylight
Average weather at Olympic by month
| Month | Avg high | Avg low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 41°F | 33°F | 8.9 in | 1.0 in | 8.6 h |
| February | 44°F | 33°F | 6.1 in | 0.5 in | 10.0 h |
| March | 50°F | 35°F | 6.9 in | 0.2 in | 11.6 h |
| April | 56°F | 38°F | 3.3 in | 0.0 in | 13.4 h |
| May | 63°F | 43°F | 1.9 in | 0.0 in | 14.9 h |
| June | 67°F | 47°F | 1.4 in | 0.0 in | 15.8 h |
| July | 74°F | 51°F | 0.7 in | 0.0 in | 15.4 h |
| August | 75°F | 52°F | 1.1 in | 0.0 in | 14.1 h |
| September | 68°F | 48°F | 1.6 in | 0.0 in | 12.3 h |
| October | 56°F | 42°F | 5.9 in | 0.0 in | 10.6 h |
| November | 46°F | 36°F | 10.1 in | 0.2 in | 9.0 h |
| December | 41°F | 33°F | 9.9 in | 0.1 in | 8.2 h |
| Year total | 57.8 in | 2.0 in |
NOAA 1991–2020 climate normals from station USC00452548, 15.1 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Olympic is at that time of year.
Olympic weather by season
Winter: December to February
Average highs climb from 41°F in December to 44°F in February, with average lows near 33°F. Together the three months average 24.9 inches of precipitation, about 43% of the yearly total and more than in any other season. Snowfall averages about 1.6 inches for the season, most of it in January. Daylight is at its shortest, about 8.2 hours in December.
Spring: March to May
Average highs climb from 50°F in March to 63°F in May, with average lows between 35°F and 43°F. Together the three months average 12.1 inches of precipitation, about 21% of the yearly total. Snowfall averages about 0.2 inches for the season. Daylight lengthens from about 11.6 hours in March to 14.9 in May.
Summer: June to August
Average highs climb from 67°F in June to 75°F in August, with average lows between 47°F and 52°F. Together the three months average 3.2 inches of precipitation, about 6% of the yearly total and less than in any other season. Daylight is at its longest, about 15.8 hours in June.
Fall: September to November
Average highs fall from 68°F in September to 46°F in November, with average lows between 36°F and 48°F. Together the three months average 17.6 inches of precipitation, about 30% of the yearly total. Snowfall averages about 0.2 inches for the season. Daylight shortens from about 12.3 hours in September to 9.0 in November.
What the National Park Service says about the weather
Summers tend to be fair and warm, with high temperatures between 65 and 75 degrees F. July, August and September are the driest months, with heavier precipitation during the rest of the year. While winters are mild at lower elevation, snowfall can be heavy in the mountains. It is common for different weather conditions to exist within the park at the same time. At any time of year, visitors should come prepared for a variety of conditions.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Olympic
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 47.80°N, 123.67°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Olympic National Park →
Weather and crowds together
August is both the warmest month and the busiest, with about 2.6× the visitors of the park's average month. December is the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Olympic National Park. For hotels, cabins and rentals close to the park, see where to stay near Olympic.
Where to stay near Olympic
Picked a month for Olympic National Park? Compare hotels, cabins and vacation rentals near the park with live availability and prices.
Top-rated places to stay near Olympic
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Frequently Asked Questions
August is the warmest month at Olympic National Park, with an average high of 75°F and an average low of 52°F. That is the 1991–2020 average at the nearest long-record NOAA station, 15.1 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
December is the coldest month at Olympic National Park, with an average low of 33°F and an average high of 41°F, based on NOAA 1991–2020 climate normals.
November is the wettest month, with about 10.1 inches of precipitation. July is the driest, at about 0.7 inches. The station records about 57.8 inches of precipitation in an average year.
Yes. The nearest long-record NOAA station, 15.1 miles from the park's reference point, averages about 2 inches of snow a year. January is the snowiest month, at about 1 inch. The station averages at least a tenth of an inch of snow in 5 of the 12 months.
Weather at nearby parks
56 mi away · warmest in August (73°F)
64 mi away · warmest in August (77°F)
111 mi away · warmest in August (69°F)
113 mi away · warmest in August (64°F)
129 mi away · warmest in August (79°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00452548), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.